Phylogenetic Signal in Mitochondrial and Nuclear Markers in Sea Anemones (Cnidaria, Actiniaria)

The mitochondrial genome of basal animals is generally more slowly evolving than that of bilaterians. This difference in rate complicates the study of relationships among members of these lineages and the discovery of cryptic species or the testing of morphological species concepts within them. We e...

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Bibliographic Details
Published in:Integrative and Comparative Biology 2010-09, Vol.50 (3), p.371-388
Main Authors: Daly, Marymegan, Gusmão, Luciana C., Reft, Abigail J., Rodríguez, Estefanía
Format: Article
Language:English
Subjects:
Actiniaria
Animals
Assembling the Cnidarian Tree of life
Bilateria
Biological taxonomies
Biomarkers
Cell Nucleus - genetics
Cnidaria
Datasets
DNA - genetics
DNA, Mitochondrial - genetics
DNA, Ribosomal - genetics
Evolution
Genes
Genetic Variation
Invertebrates
Marine
Mitochondria
Parsimony
Phylogenetics
Phylogeny
Proportions
Ribosomal DNA
Sea Anemones - genetics
Sequence Analysis, DNA
Signal Transduction - genetics
Taxa
We they distinction
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Summary:The mitochondrial genome of basal animals is generally more slowly evolving than that of bilaterians. This difference in rate complicates the study of relationships among members of these lineages and the discovery of cryptic species or the testing of morphological species concepts within them. We explore the properties of mitochondrial and nuclear ribosomal genes in the cnidarian order Actiniaria, using both an ordinal- and familial-scale sample of taxa. Although the markers do not show significant incongruence, they differ in their phylogenetic informativeness and the kinds of relationships they resolve. Among the markers studied here, the fragments of 12S rDNA and 18S rDNA most effectively recover well-supported nodes; those of 16S rDNA and 28S rDNA are less effective. The general patterns we observed are similar to those in other hexacorallians, although Actiniaria alone show saturation of transitions for ordinal-scale analyses.
ISSN:1540-7063
1557-7023
DOI:10.1093/icb/icq081